US2217401A - Saw-tooth wave generator - Google Patents

Saw-tooth wave generator Download PDF

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Publication number
US2217401A
US2217401A US230399A US23039938A US2217401A US 2217401 A US2217401 A US 2217401A US 230399 A US230399 A US 230399A US 23039938 A US23039938 A US 23039938A US 2217401 A US2217401 A US 2217401A
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US
United States
Prior art keywords
condenser
potential
circuit
saw
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US230399A
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English (en)
Inventor
Geiger Max
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US2217401A publication Critical patent/US2217401A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/86—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements gas-filled tubes or spark-gaps
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/12—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor
    • H03K4/16—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor using a single tube with positive feedback through transformer, e.g. blocking oscillator

Definitions

  • quarter waves are set up which represent the return stroke or fiyback part of the sawtooth Wave, in other words, its rapidly dropping stroke or downstroke, while the charge of the condenser in the parallel resonance circuit occurs in one sense through the resistance and in the other sense through the said quarter oscillation or cycle.
  • Fig. 1 is one embodiment thereof
  • Fig. 2 is an explanatory curve
  • Fig. 3 is a still further embodiment of my invention.
  • the parallel resonance circuit in the grid circuit of the controlled tube In comprises the condenser II as well as the choke coil [2.
  • a source of D. C. potential IS in series with a resistance I4 while in the coil branch in series with the coil I2 is a rectifier l5.
  • the said coil I2 is in inductive coupling relationship with the coil l6 included in the plate circuit of tube Ill.
  • the plate potential source is indicated at H.
  • the condenser will then be charged through the resistance M, the voltage at the condenser following an e function, tending initially towards zero condenser potential.
  • This shape and trend of the potential prevailing at the condenser will also persist without change even when the control grid of the tube It has reached a potential such that current flows in the plate circuit of this tube. It will be seen that in this case a constant potential will only arise at the coil l2, and this potential shall be assumed to have a sign such that the terminal thereof connected to the grid of the tube I0 is positive.
  • the differential quotient of the current rise in the plate circuit in some Way reverses its sign, and this, for instance, may be insured by impressing upon a further control grid of the tube l0 an impulse resulting in a reduction of the current, the sign of the potential across the coil l2 will be reversed.
  • the rectifier I5 will be opened, that is, permit fiow ofcurrent. What then happens is that the entire magnetic energy of the coil l6 becomes discharged through the rectifier l5, and the condenser II will again be charged up strongly as hereinbefore explained.
  • the attained voltage level at the condenser H being essentially governed again by the magnetic energy of the coil H5.
  • the invention particularly has the object to prevent the production of saw-tooth waves of varying amplitude which inherently is liable to arise in saw-tooth wave generators of this nature.
  • a voltage Wave U11 as shown in Fig. 2 may be'produced at condenser H.
  • the charge which the condenser ll receives in .a'quarter-wave or cycle action is predicated upon the magnetic energy of the coil l6.
  • a saw-tooth wave generator comprising a parallel resonant circuit having two branches, one branch comprising an inductive member in series with a uni-directional conductor, and the other branch of which comprises a condenser means; a thermionic vacuum tube having anode, cathode and at least one control electrode, said parallel resonant circuit being connected in an electrode-cathode circuit of said thermionic tube, meansfor coupling said inductive member of the parallel resonant circuit to another of the electrodes of said thermionic tube, and a series circuit comprising a uni-directional conducting member and a source of fixed potential, said series circuit being connected in parallel with said condenser means.
  • Apparatus in accordance with claim 1 wherein the uni-directional conductor in the series circuit recited comprises a diode.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • X-Ray Techniques (AREA)
  • Rectifiers (AREA)
US230399A 1937-06-15 1938-09-17 Saw-tooth wave generator Expired - Lifetime US2217401A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET0048742 1937-06-15

Publications (1)

Publication Number Publication Date
US2217401A true US2217401A (en) 1940-10-08

Family

ID=7562932

Family Applications (1)

Application Number Title Priority Date Filing Date
US230399A Expired - Lifetime US2217401A (en) 1937-06-15 1938-09-17 Saw-tooth wave generator

Country Status (3)

Country Link
US (1) US2217401A (fr)
FR (1) FR839288A (fr)
GB (1) GB515903A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542807A (en) * 1946-10-24 1951-02-20 Westinghouse Electric Corp Electronic transfer unit
US2593330A (en) * 1949-06-02 1952-04-15 Bell Telephone Labor Inc Variable frequency relaxation oscillator
US2676263A (en) * 1946-09-16 1954-04-20 Hartford Nat Bank & Trust Co Impulse generator
US2689913A (en) * 1949-01-18 1954-09-21 Du Mont Allen B Lab Inc Means for stabilizing oscillator circuit
US3067393A (en) * 1958-04-01 1962-12-04 Hughes Aircraft Co Pulse generator
US3133229A (en) * 1950-06-12 1964-05-12 Fleming Lawrence Actuation level control circuit for an electro-responsive device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676263A (en) * 1946-09-16 1954-04-20 Hartford Nat Bank & Trust Co Impulse generator
US2542807A (en) * 1946-10-24 1951-02-20 Westinghouse Electric Corp Electronic transfer unit
US2689913A (en) * 1949-01-18 1954-09-21 Du Mont Allen B Lab Inc Means for stabilizing oscillator circuit
US2593330A (en) * 1949-06-02 1952-04-15 Bell Telephone Labor Inc Variable frequency relaxation oscillator
US3133229A (en) * 1950-06-12 1964-05-12 Fleming Lawrence Actuation level control circuit for an electro-responsive device
US3067393A (en) * 1958-04-01 1962-12-04 Hughes Aircraft Co Pulse generator

Also Published As

Publication number Publication date
GB515903A (en) 1939-12-18
FR839288A (fr) 1939-03-30

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